A Technique For Estimating System-Wide Phasors In Real Time

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Abstract

The objective of this study is to investigate the application of Synchronized Phasor Measurement techniques in real time estimation of power system phasors. The WSCC System is a very large power system network constituted by a number of electric utilities and power companies. The system was analyzed and equivalents developed to suit the purpose of this project. Using these equivalents, the system was simulated for various contingencies to analyze its behavior. The purpose is to develop a technique for estimating the voltage phasors at all major substation buses of the system from a limited number of available real time phasors at a fixed set of substations. The system load flow was computed for various possible loading situations. Various loading patterns were created around a base summer time load flow case. Using the results from these computations, an empirical relationship was developed between phasors from a fixed set of locations and the unknown phasors at the rest of the system buses.